Southern Railway — unreserved passenger at sleeper class in yercaud express

Address:

637304

Hi, i have travelled from erode to chennai central through yercaud express (22650) which started from erode yesterday and reached chennai today (04/23/2018).
Unreserved passengers got into our coach s4 from katpadi and started chatting among them loudly. They got down at tiruvallur. They didn't even bother sleeping passengers. This is happening often. After middle of night, no ticket checking is there which they take to their advantage.
If some ticket checking is there on every coach before train reaches tiruvallur, these circumstances could be avoided. Kindly help on this issue.